9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
10 High
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
47.8%
Successful exploitation of this vulnerability could allow an unauthenticated attacker to escalate privileges or execute arbitrary code.
The following products of Siemens, are affected:
3.2.1 HEAP-BASED BUFFER OVERFLOW CWE-122
In CodeMeter Runtime versions up to 7.60b, there is a heap buffer overflow vulnerability which can potentially lead to a remote code execution. Currently, no PoC is known. To exploit the heap overflow, additional protection mechanisms need to be broken. Remote access is only possible if CodeMeter is configured as a server. If CodeMeter is not configured as a server, an attacker would need to log in to the machine where the CodeMeter Runtime is running or trick a user into sending a malicious request to CodeMeter. This might result in an escalation of privilege. (WIBU-230704-01)
CVE-2023-3935 has been assigned to this vulnerability. A CVSS v3 base score of 9.0 has been assigned; the CVSS vector string is (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H).
Siemens reported this vulnerability to CISA.
Siemens has identified the following specific workarounds and mitigations users can apply to reduce risk:
<https://www.wibu.com/support/user/user-software.html> and follow the installation instructions from WIBU Systems.
<https://www.wibu.com/support/user/user-software.html> and follow the installation instructions from WIBU Systems.
For installations of CAPE V14 using material earlier than 2023-08-23: Install WIBU Systems CodeMeter Runtime V7.60c or later version manually to fix the issue: Download the package from <https://www.wibu.com/support/user/user-software.html> and follow the installation instructions from WIBU Systems.
<https://www.wibu.com/support/user/user-software.html> and follow the installation instructions from WIBU Systems.
As a general security measure, Siemens recommends protecting network access to devices with appropriate mechanisms. To operate the devices in a protected IT environment, Siemens recommends configuring the environment according to Siemens’ operational guidelines for industrial security and following recommendations in the product manuals.
Additional information on industrial security by Siemens can be found on the Siemens industrial security webpage
For more information see the associated Siemens security advisory SSA-240541 in HTML and CSAF.
CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability, such as:
CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.
CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.
CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets.
Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov in the technical information paper, ICS-TIP-12-146-01B–Targeted Cyber Intrusion Detection and Mitigation Strategies.
Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.
No known public exploitation specifically targeting this vulnerability has been reported to CISA at this time. This vulnerability has a high attack complexity.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-3935
cert-portal.siemens.com/productcert/csaf/ssa-240541.json
cert-portal.siemens.com/productcert/html/ssa-240541.html
cwe.mitre.org/data/definitions/122.html
github.com/cisagov/CSAF
new.siemens.com/global/en/products/services/cert.html#SecurityPublications
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
twitter.com/CISAgov
twitter.com/intent/tweet?text=Siemens%20WIBU%20Systems%20CodeMeter+https://www.cisa.gov/news-events/ics-advisories/icsa-23-257-06
us-cert.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf
www.cisa.gov/resources-tools/resources/ics-recommended-practices
www.cisa.gov/sites/default/files/publications/Cybersecurity_Best_Practices_for_Industrial_Control_Systems.pdf
www.cisa.gov/topics/industrial-control-systems
www.cisa.gov/topics/industrial-control-systems
www.cisa.gov/uscert/ics/alerts/ICS-ALERT-10-301-01
www.cisa.gov/uscert/ics/tips/ICS-TIP-12-146-01B
www.dhs.gov
www.dhs.gov/foia
www.dhs.gov/performance-financial-reports
www.facebook.com/CISA
www.facebook.com/sharer/sharer.php?u=https://www.cisa.gov/news-events/ics-advisories/icsa-23-257-06&title=Siemens%20WIBU%20Systems%20CodeMeter
www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
www.instagram.com/cisagov
www.linkedin.com/company/cybersecurity-and-infrastructure-security-agency
www.linkedin.com/sharing/share-offsite/?url=https://www.cisa.gov/news-events/ics-advisories/icsa-23-257-06
www.oig.dhs.gov/
www.siemens.com/cert/operational-guidelines-industrial-security
www.siemens.com/industrialsecurity
www.surveymonkey.com/r/CISA-cyber-survey?product=https://www.cisa.gov/news-events/ics-advisories/icsa-23-257-06
www.usa.gov/
www.whitehouse.gov/
www.wibu.com/support/user/user-software.html
www.wibu.com/support/user/user-software.html
www.wibu.com/support/user/user-software.html
www.wibu.com/support/user/user-software.html
www.winccoa.com/downloads/category/versions-patches.html
www.youtube.com/@cisagov
mailto:?subject=Siemens%20WIBU%20Systems%20CodeMeter&body=www.cisa.gov/news-events/ics-advisories/icsa-23-257-06
9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
10 High
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
47.8%